Using carrot centromeric repeats to study karyotype relationships in the genus Daucus (Apiaceae)

BMC Genomics

Table 2 Karyotype features of the studied accessions

Taxon	Accession	2n	KF^a	THCL^b (μm)	CLR^c (μm)	CV_CL^d	CV_CI^e	M_CA^f	St^g
Daucus aureus	PI 319403	22	1m + 10sm	23.50	1.54–2.89	17.85	10.23	36.89	3A
D. carota subsp. capillifolius	PI 279764	18	8sm + 1st	28.67	2.32–4.08	17.68	22.12	34.63	3A
D. carota subsp. capillifolius	Ames 30198	18	8sm + 1st	22.19	1.89–3.36	18.33	16.94	34.79	3A
D. carota subsp. carota	PI 274297	18	7sm + 2st	28.95	2.38–4.03	17.26	20.19	34.01	3A
D. carota subsp. carota	PI 478369	18	1m + 6sm + 2st	24.56	2.07–3.61	16.21	18.24	33.36	2A
D. carota subsp. carota	PI 478861	18	1m + 4sm + 4st	31.15	2.62–4.33	15.13	26.50	35.89	3A
D. carota subsp. carota	PI 652393	18	6sm + 3st	25.23	2.04–3.45	15.52	19.38	35.79	3A
D. carota subsp. gummifer	PI 478883	18	5sm + 4st	33.47	2.72–4.77	17.42	24.31	35.94	3A
D. carota subsp. gummifer	Ames 26383	18	1m + 5sm + 3st	28.32	2.39–4.20	17.41	18.45	34.06	2A
D. carota subsp. sativus	‘Amsterdam’	18	7sm + 2st	29.86	2.55–4.16	16.04	24.37	35.73	3A
D. carota subsp. sativus	‘Dolanka’	18	1m + 8sm	29.90	2.65–4.26	14.70	18.93	31.04	3A
D. carota subsp. sativus	DH1	18	8sm + 1st	28.08	2.42–3.91	14.38	19.65	34.45	3A
D. rouyi	PI 674284	20	2m + 8sm	35.50	2.45–5.12	20.41	14.47	38.74	3A
D. sahariensis	Ames 29097	18	2m + 7sm	27.97	2.24–4.20	20.46	13.68	32.28	3A
D. syrticus	Ames 29108	18	6m + 3sm	26.86	2.25–4.07	17.66	9.39	26.08	2A
Orlaya daucoides	PI 649477	16	2m + 6sm	35.61	3.27–7.73	30.47	12.16	20.55	2A

Note: The formulae of the above parameters (CV_CL, CV_CI, M_CA) and the karyotype symmetry classes of Stebbins are given in Additional file 2: Table S1 and Additional file 3: Table S2, respectively
^a KF, haploid karyotype formula (m, metacentric; sm, submetacentric; st, subtelocentric)
^b THCL, mean total haploid chromosome length
^c CLR, Chromosome length range
^d CV_CL , Coefficient of variation of chromosome length
^e CV_CI , Coefficient of variation of the centromeric index
^f M_CA , Mean centromeric asymmetry
^g St, karyotype symmetry class according to Stebbins [40]

ISSN: 1471-2164